Finger-ring mold.



No. 747,058. I I PATENTED DEC. 15, .1903. w. H. FORD. FINGER RING MOLD.

APPLICATION FILED MAR. 50. 1903. RENEWED NOV. 23, 1903.

N0 MODEL. I

. av I WW J J3 llivirnn starts WILLIAM H. FORD,

Patented Ibeoemloer 15, 1903.

Patient Oriana,

lFlNGER RlNG MOLD.

SPECIFICATION forming part of Letters Patent No. 747,058, dated, De ember 15, 1903.

Application filed March 30,1903. Renewed November 23, 1908. Serial No. 182,409. (No model.)

To all whom it may concern:

Be it known that I,WILLIAM H. FORD,a citizen of the United States, residing at Lowell, in the county of MiddleseX and State of Massachusetts, have invented an Improvement in Finger-Ring Molds, of which the following description, in connection with the accompanying drawings, is a specification,like characters on the drawings representing like parts.

This invention has for its object the production of a novel moldfor casting fingerrings, the mold shown being an improvement upon'that represented in United States Patout No. 662,562, granted to me November 27, 1900.

The mold to be herein described comprises mold-sections having a core, each mold-section being used to cast and shape that part of the finger-ring embracing the under side of the finger and the sides thereof toward the top of the finger, and a crown-section composed of cuttlefish, in which is cast the crown or top of the ring and a portion of the ring depending from the crown and overlapping a part of the opposite sides of the finger for a greater or less distance.

In the patent referred to only the crown of the ring was cast in the crown-section, and no part of the ring to embrace the sides of the finger was cast in said crown-section.

In the patent referred to the mold-sections were out as a chord to the ring-groove, but herein the mold-sections are out to intersect the core as a secant, and the part of the core outside the secant line and next the cuttlefish crown section enters a recess formed therein, said recess containing one or more crown-impressions, a portion of the body of the ring to be cast extending from the crownimpression and partially overlapping the sides of the finger.

Another feature of invention herein to be claimed is a provision for centering the crown-section with relation to the mold-sections, and to do this I have shown the moldsections as provided with crown-section-positioning means, shown as flanges, that serve to accurately position the longer sides of the crown-sections on the mold-sections.

Figure 1, in side elevation, represents a finger-ring mold including my present invention; Fig. 2, an end view thereof; Fig. 3, a detail showing. the face of one of the mold sections; Fig. 4, a top view of the assembled mold sections with the crowmsection removed; Fig. 5, a face view of the crown-section, showing a plurality of crown-impressions therein and depressions for forming part of the finger-embracing portion of the ring. Fig. 6 shows a face view of the crown- 6o impression with a bridge inserted, the bridge corresponding insize with the portion of the core removed by cutting the same as a secant. Fig. 7 is a cross-section of Fig. 6 in the line 00, and Fig. 8 shows a ring such as may be cast in the mold herein to be described.

The mold-sections AA are composed of charcoal, and each section has a mold-groove A surrounding a core A said core having a central opening 1 for the reception of a pin 2 by which to center the mold-sections and aline the grooves A Each mold-section has a runway 3.

The ends of the mold-sections opposite the run wayhave crown-section-positioning means a, shown as flanges, that contact with the longer side edges of the crown-section c of cutt-lefish, having an impression corresponding with the shape of the casting to be formed therein. These flanges serve to retain the crown-section in position on the mold-sections.

The mold-sections and core are ventilated,

as shown at 5 6 7, as in my application, Serial No. 150,195, filed on the 30th day of March, 1903, wherein this mold ventilation is claimed broadly.

The cuttlefish crown-section of the mold herein to be described is adapted for casting not only the crown or enlarged top part of the ring, but also a part of the ring to partially overlap the sides of the finger. The crownsection herein shown is adapted for casting aring having a plurality of crowns to hold a 5 plurality of stones. The surfaces In of the mold-sections abut the face of the crown-sec, tion of cuttletish in a line secant to said corethus bringing the face of the crown-section closer to the center of the core.

The crown-section shown has impressed into its face a recess it, (see Fig. 5,) and in fore casting there is laid in the recess h a piece of charcoal h, herein described as a bridge, the straight face of which contacts with the secant face of the mold-section and its core, the convexed side of the bridge crossing the depressions g and g and shaping the interior of the part of the ring crossing the top of the finger and overlapping somewhat the sides of the finger below that part thereof against which rests the under side. of the crown.

The molten metal poured into the runway of the mold inverted from the position Figs. 1 to 3 enters the mold-grooves in the moldsections and crossing the bridge enters the depressions g g of the crown-section and shapes not only the crown of the ring, but also portions of the ring to embrace the sides of the finger. The bridge acting with the core aids in defining the finger size of the ring.

It will be noted that the depressions g g for casting the parts g of the shank of the ring have a spiral trend with relation to each other and the part of the ring cast in the mold-sections, said parts being offset with relation to the part of the shank of the ring crossing the under side of the finger.

Herein I do not claim anything in my application, Serial No. 149,020, filed March 23, 1903, which contains broad claims for mold- I sections and a detachable core; nor do I March 30, 1903.

The mold-sections are centered by a pin 2, inserted through the center holes 1, and after the crown-section has been put in position a rubber strap 1", embracing the ends of the pin, is crossed over the crown-section. The length of the crown-section is just equal to the thickness of the two mold-sections'applied to the pin, and the sawed ends of the crown-section aline exactly with the backs of the mold-sections. The external shape of the sides and ends of the crown-section and the size of the crown-section with relation to the size of the mold is an important feature of invention, as it enables the impression in the crown-section to be exactly centered with relation to the ring-groove A Having described my invention, what I claim, and desire to secure by Letters Patent,

1. A finger-ring mold comprising mold-sections having flanges and containing moldgrooves and a crown-section held in position by said flanges.

2. A finger-ring mold comprising non-metallic mold-sections containing mold-grooves and provided with flanges to leave a space at one end of the united mold-sections, and a non-metallic crown-section shaped to enter the space between said flanges and be retained thereby in centered relation with the mold-grooves.

3. A finger-ring mold comprising mold-sections containing mold-grooves surrounding a core, said core being cut away on a line to cross the mold-groove and the core to leave a secant face on part of the core.

4:. A finger-ring mold for ring casting comprising mold-sections containing moldgrooves and a core integral with said sections to define the finger size, a crown-section containing a recess and a crown-impression, and a bridge in said recess and completing the core.

5. A finger ring mold for ringcasting comprising mold-sections containing moldgrooves and a core integral with said sections to define finger size, and a crown-section having a recess and depressions to define both the crown or top of the ring and part of the body of the ring, the recess of said crownsection being entered by a portion of the core forming part of the body of the ring.

6. A mold for casting finger-rings comprising mold-sections having mold-grooves and a core to define the finger size of the ring, and a crown-section having a recess containing crown-impressions for defining a plurality of crown-sections, and other depressions communicating with said crown-im pressions, said other depressions having a spiral trend one with relation to the other and receiving metal for forming part of the ring embracing the core.

7. In a mold for casting finger-rings, moldsections having an integral portion forming a core, and mold-grooves surrounding said core, a crown-section shaped to form the enlarged crown of the ring and apart of the shank thereof embracing both sides of the finger below the point where the inner side of that part of the ring having the crown contacts with the finger.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM H. FORD.

Witnesses:

GEO. W. GREGORY, MARGARET A. DUNN.

IIO 

